Focusing-light producer.



J. M. STAFFOBBg VEN TOR WITNESSES! UNITED sTATEs PATENT onirica.

Focusing-'LIGHT PRODUCER.

Application led September 17, 1908. Serial No. 453,511.

To all whom it 'may concern;

Beit known'that I, JAMES M. STAFFORD, av citizen of thel United States, residing at Petersburg, in the county of Pike and State of Indiana, have invented certain new and -useful Improvements in Focusin -Lighty Producers; and I do declare the folowing to be a full, clear, and exact description of the inventi'oiifreference being had to the accompanying drawings, and to the letters and figj ures of 'reference marked thereon, which form va part of 'this specification.

This invention relates -to apparatus Whereby' artificial'li'ght may be produced-to be focused onto moving picture films in moving :picture machines that are employed foi1 reproducing or projecting the pictures onto canvas for displaying them, the vinvention having reference more particularly to a lain burner that vis adapted to be used in horizonteil ositions so as vto enable the operator of moving-picture machines to attain the best results --byanear'is of the strongest light at relatively small expense.

Objects of the invention are to provide an .improved lamp and burner that will produce the maximum degree of light with a light condenser for various purposes, and whereby exceedingly strong light may be obtained with correct focusing by the use of gasoleiie or gas, particularly when electric lihts are not obtainable or when calcium lights may be objectionable; a still further object being to provements embodied therein; Fig. 2, an end i lelevation of the machine in which parts of vthe apparatus are omitted so as to expose lother parts; Fig. 3, a transverse sectional view of the lamp case on the line A--A- in Fig. 1 Fig. 4, a fragmentary sectional View at the plane `of the lii'ieB--B in Fig. 3; Fig. 5,' a perspective view of adjustable lampstand; Fig'. 6, a perspective view of an adjustable mantle supporter; Fig. 7, a longi- Specification of Letters Patent.

Patenteinug. 3, i909;

tudinal central sectional view of the improved lamp; Fig'. 8, a perspective view of the im roved mantle; Figj 9, a longitudinal centra sectional view of a modified mantle; and` Fig. 10 a perspective view ofthe modified form of mantle.

Similar reference characters in the differ.- ent figures of the drawings indicate like elements or features of constructionmentioned herein.

In the drawings the numeral 1 indicatesa stand on which is mounted a lamp case or box 2, 2l and 2" being opposite ends thereof, and on the. end 2 is a tube 3 in which are two lenses V4 and 5 constituting a condenser to focus light into the moving-picture inachine proper, the 'case having a top 6 having a lid portion 6 and an aperture 7 from which heat may escape. The lamp case or box ma be of various forms of construction or 'suc as are commonly used for -the purpose, but in different forms of cases the condenser may be at `different heights from the bottom of the case, and in order to adaptv the case to receivethe improved burner a vertical slot 8 is formed in the end 2 to permit of vertical adjustment of the lamp, and such lamp as may have heretofore been used may be removed so that the improved lam may be mounted in lieu thereof. Obvious j the iinpioved lamp may be provided with any suitable case. I

.The improved lamp comprises a stand having a vertical stem 9 that is fiXedly mounted on the bottom of the case 2, a block 10 that is mounted adjustably on thc stein and provided with a binding screw 11 for fixing it to the stem at any desiredpositioii, the block having a collar 12 formed thereon that is provided with a binding screw 13 for securing a feed-pipe 1,4 which extends through the collar and may be adjusted longitudinally toward or from the condenser. The pipe 14 extends out through the slot 8 that is in the end 2 of the lamp case. v The lamp-burner comprises a tube 15 that is inserted removably in the inner end of the pipe 14. A- collar leirtends around the inner end portion of the pipe 14- and is provided with a binding screw 17 so that the collar may be adj ustably secured to the pipe, the collar having an arm 18 thereon in which is adj ustably z mounted a rod 19 having a hook 20 on one end thereof,

the rod being secured to the Larm .inlany der sired position by a `binding screw 21 with which the arm is provided.

. The improved burner comprises a mantle havin g the body portion thereof made of tubular form and preferably comprises a tube 22- coinpos'ed of asbestos and having one end thereof connected to the end of the tube 15, the other end portion of the mantle l1aving apertures 23 therein and also having an asbestos loop 24 connected c thereto that engages the hook 2() for supporting' the free end of the mantle. said free end of the mantle body being partially closed by an)T suitable mantle fabric 5 of circular shape. The loop 24 is at the uppermost portion of the .mantle body when 1n operative position and the fabrlc has openings therein that vary in area, the lorfermost openings being larger than the uppermost opmningrs t, it being designed to retard the ese L of gas through the upper portion of the faln'ic,

The modified. mantle shoen in if gs. 9 and l() is also of tubular form, but is formed throughout of suitable mantle fabric such as is commonly used, or of other suitable inaterial and comprising a tubular bod;T portion' 27 ato'ne end of which an asbestos thread .28 isvroven therein for holding the mantle on the tube l5, the other end of the mantle having' an asbestos thread 2Q vfoven therein and having a loop 30 formed thereof to engage. the hook 20 for supporting the end of the mantle, said end having the mantle fabric end part 125 as lnreinbefore described, so that the incamlescent light which may be oh- -tained will appear as a disk directly opposite the. lens s and in a plane parallel to the plane of the lens.

A regulating' valve 3i is connected to the 'feed pipe lei and has a flexible tube 32 con nected thereto, the tube being' coinieeted to a ,iras generator 33 which is coniufcted by a tube orpipe 534 'with a g'asolene tank S5 provided with an air-pump 36 that is/connocted by pipe 37 'to the tank, and in order to eliminate danger 'from fire or explosions the tank maT be placed outside of the exhibition halls.

, The picture machine properis indicated by the numeral 3S on which is mounted a reel 3) from which a iilin 40-inay be. unwound into a box 4l, the apparatus having; a light receiver 42 arranged opposite to the, lens 5 oiA the condenser, and the, apparatus being; Woll known requires no further dcscript-ion herein. it is shown in order to clearly lain one ot' the uses and peculiar adv: tages of the invention.

lt should be 'understood that While it is designed to supply gas generated from gasolene through the tube 352, any other suitable gas or iluid maj,T be conveyed thro ugh a s'uitable conduit to the feed pipe 11i' and the tion' l regulated by the valve 3l.

in practical use the illuminating' gas-is fed through the pipe Hand regulated in volume by tho valve 3l, the eas [lowing through the tube l5 and the mantle thereon and is ignited and consumed `at the disk-shaped fabric at `which an nincamleseent, light of great brilliancy is produced diejectlv opposite to thc lens fl, the two lenses 4l and 5.foeusing the light into the receiver 42 and onto the hlm 40, the picture apparatus being provided with suitable means for projecting the pictures on a magnified scale onto a canvas, as will be understood, and it will be clear from the foregoing' description that the burner may be readily' adjusted toward or from the condenser, as may be rccpiired, or vertically so as to be fair or in alinement with thev condenser. -lt will be understood that such ap paratus must be operated in substantialT norizontal positions and the tendency of the gras will be to escape from the uppermostportions of the mantle which, however, is rotarded b v the smaller openings 26 in the mantle fabric 25 so that the combustion is approximately uniform on the Whole disk-V shaped fabric;` therefore, a light of uniform brilliancv is at all times maintained, and by reason of the fact that the light proceeds from one vertical plane toward the condenser the light converges at one point on the condenser, whereby the most satisfactory ref sults are attained.

Having thus described the invention, What is claimed as new, is-

1. A mantle comprising,r a tubular bodhv portion having' apertures therein, and a foraminous end connected to the body portion and having' portions thereofthat havev smaller openings than other portions thereof to retard the tion' of fluid through portions .a'1lv'of the end. i

A mantle comprising' a tubular foranxinous bod)T portion having' a loop on one side of one end part thereof, and a foraminons end connected to one end of the body portion and partiall;T closing the end of the body portion in a greater degree near one side than atthe opposite side of the b'odyportion.

3. The combination of a horizont al tube, a mantle having a tubular body portion arranged horizontally and connected to the tube and a foraminous end connected to the body portion, said body portion having 'a lo'op atsaid end on the uppermost portiornof the side thereof, and a rod lsuitably supported and havinga hook engaging' the loo I 4. The combination of aI fixedP upright stern, a collar supported on the stem and adjustable verticali)-v thereon, a pipe secured horizontallv in the collar and adjustable longitiulinally therein,-a tube connected to The pipe, a collar secured,adjustably to the E)ipe and having' an arm thereon, a mantle arranged horizontally in connection with the tube and having` a loop on tlie uppermost side of the end portion thereof, and a rod mounted adjust-abi)v on the arm and having' a .hook

connected to the loop.

5. The combination of a horizontal tube, a mantle having a tubular body portion arranged horizontally and connected to' the tube and a'foraniinous end to the body portion, said bo y portion having a non-combustible thread Woven therein that extends about the tube, and having also a non-combustible thread -Woven thereinadjacentto said end part provided'with a loop that is situated on the uppermost portion of the body portion of the mantlej and a rod suitably supported and having a lhook en.-

gaging the loop.

6. The combination of an inolosing oase, a burner tube mounted in the case horizontally, a supplytube connected With the burner tube, a focusing lens mounted in the case opposite the open end of the burner art connected tube, a mantle having a tubular bonyI portion arranged horizontally and connected to the burner tube, and a foraminous end part connected to the Abody portion, the end part being flat and opposite. the lens andthe uppermost portions thereof having smaller openings than the lowermost portions thereo to retard the flow of illuminating iiuid through the said upper portions, whereby a iiow of fluid is insured through said 'lowermost portions opposite to the lens.

In. testimony whereof, I aHiX my signature `in presence of tWo Witnesses.

JAMES MORTON STAFFORD. 

